Thanks for the comments!
kaki: i believe you mean crop the sides? As cropping the top and bottom would make it somewhat unbalanced... If that's the case, i see what you mean.
I have to fill 640x480, so i'd have to make some readjustments, add more stuff to the cropped parts, but i'll look into it, thanks. Maybe grouping the several elements together more would solve that.
I'll have to fill the sky with something, still unsure about clouds/birds/pollution or some graphic element connecting the title with the rest.
I don't think lowering it would help, it would look even more empty near the middle... I have a hard time doing logos with lettering and titles, can't always fill it up as i imagine it should look.
"Aquecimento Radical" means "Radical Warming", as in "Global warming"... yeah, i know... it's AWESOME!!!1
eck: i think a more unified, warmer skin palette would lose the contrast and visual impact of the hair. Also, i don't think the anatomy edits fit the style i was going for - cartoonish (with a hint of realism) and young - also it changes the lightsource. Hue shifts on the sweater are kinda too strong too, but i'll take it into account when readjusting the sweater palette.
philipptr: i didn't add highlights to the face to keep a cartoonish, half cel-shaded, half realistic look, but i may look for a solution to still keep the style and and more depth.